Question 8
SurdsSimplify √(160r2 + √(71r4 + √(100r8)))
- A.9r2
- B.12√3r
- C.13r
- D.√13r
Show the answer and explanation
Answer: C (13r)
Explanation
Work from the inside: √(100r8) = 10r4, then √(71r4 + 10r4) = √(81r4) = 9r2, then √(160r2 + 9r2) = √(169r2) = 13r.